[Frameworks] Moviola optical reader conversion

[George, Sherman]

Ryder,
The amp used with this reader is the Moviola URS-1
The coaxial connector is the 6 volts for the lamp.
As I remember the sound pickup is a photo tube that requires 70 volts on pin 2 and 4 of the 4 pin connector.
Not an easy amp to replicate in this day of solid state electronics and very pricey on the used market as Jeff said.
If you can find a tech who can replace the phototube with a modern photocell the output could be fed to most audio amps and you would need to connect a well filtered 6 volt supply to the lamp.
Even when new these amp/readers had a lot of 60 cycle  hum.
Sherman


[Image result for magnasync URS-1 diagram]<https://www.gearslutz.com/board/geekslutz-forum/527249-mods-magnasync-tube-mic-pre.html>
On Jan 8, 2017, at 10:01 AM, Ryder White <ryder.white at gmail.com<mailto:ryder.white at gmail.com>> wrote:

Hi there lovely Frameworkers,

A little while ago I got a couple of 16mm Moviola SR0 optical sound readers with a new sync block I bought on eBay. I think they are meant to attach to a moviola squawk box with two connections: one 4 pin connector, presumably for power, and a coaxial connector, presumably for signal. I'm interested in trying to convert them to output to a 1/4" jack or something similarly ubiquitous, which I suppose will require a separate power supply for the exciter lamp.

If anyone has undertaken a similar project, or has any knowledge about the specifics of each of the connectors, I'd be glad to know about it before I start tearing into them.

Thanks!

Ryder




--

Sent from mobile device, please forgive typographic errors. -RTW

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Sherman George
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